CuZnMgAl水滑石衍生金属氧化物对废水中Pb(Ⅱ)的吸附  

Adsorption lead ion in waste water by metallic oxides derived from CuZnMgAl-hydrotalcites

作　　者：王军涛[1] 陈兰萍[1] 詹正坤[2] 

机构地区：[1]咸宁学院化学与生命科学学院,湖北咸宁437100 [2]华中师范大学化学学院,湖北武汉430079

出　　处：《化学研究》2012年第1期39-42,共4页Chemical Research

基　　金：咸宁学院第四期大学生课外科技项目;咸宁学院校级青年科研项目(KY10051)

摘　　要：采用共沉淀法合成了不同物质的量之比的CuZnMgAl水滑石(CuZnMgAl-HT),采用X射线衍射仪和热分析仪分析了其晶体结构和热稳定性;将CuZnMgAl-HT的焙烧产物作为吸附剂,测定了其对废水中Pb(Ⅱ)的吸附性能.结果表明,最佳吸附条件为温度30℃,pH 6.0,初始浓度80mg/L,水滑石前体Cu、Zn、Mg、Al的金属物质的量之比为1∶1∶4∶2,吸附时间40min时,相应的吸附率可达95.23%.CuZnMgAl-hydrotalcites （CuZnMgAl-HT） with different metal molar ratios were synthesized by copreeipitation method. The crystal structure and thermal stability of as-synthesized CuZnMgAl-HT were analyzed by means of X-ray diffraction and thermal analysis. More- over, as-synthesized CuZnMgAl-HT was calcinated, and the adsorption performance of the calcinated product, compound metal oxides, for Pb（ II ） in waste water was examined. The optimum condition for adsorption is suggested as temperature 30 ℃, pH value 6.0, initial lead ion concentration 80 mg/L, CuZnMgAl-HT precursor metal molar ratio of Cu,Zn,Mg,Al was 1 ： 1 ： 4 ： 2, and adsorption time 40 min. Corresponding adsorption rate reaches as much as 95.23%

关 键 词：水滑石 金属氧化物 二价铅 吸附 

分 类 号：X703[环境科学与工程—环境工程]